Ti和Mg对Al基复合材料组织性能的影响  

Effects of Ti and Mg on Structure and Properties of Al Matrix Composites

作　　者：王莲莲 徐道兵 龙威 周小平 Wang Lianlian;Xu Daobing;Long Wei;Zhou Xiaoping(Hubei Provincial Key Laboratory of Green Materials for Light Industry,School of Materials and Chemical Engineering,Hubei University of Technolog)

机构地区：[1]湖北工业大学材料与化学工程学院、绿色轻工材料湖北省重点实验室,武汉430068

出　　处：《特种铸造及有色合金》2018年第11期1238-1241,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51171062)

摘　　要：采用粉末冶金法制备了不同成分的Al基复合材料,经机械混合后,以一定的压力冷压成型,然后在氩气保护环境下以一定的升温工艺在550℃下进行烧结,保温30min,随炉冷却。结果发现Al-Mg系复合材料孔隙率较高;Al-Ti系复合材料中Al基体与Ti颗粒为物理结合;Al-Mg-Ti系复合材料的致密性较Al-Mg系有较大改善,且有三元相Al_(18)Ti_2Mg_3生成,Mg降低了Al-Ti体系的相变温度,且Mg的增加有利于Al-Ti反应进一步发生,最终形成了三元相。Al matrix composites with different composition were prepared by powder metallurgy.After mechanical mixing,the powder was formed by cold pressing at a certain pressure,then sintered at 550℃ in argon atmosphere and holding for 30 minutes and then cooling with the furnace.It is found that the porosity of Al-Mg composites is higher,and the Al matrix and Ti particles in Al-Ti composites are physically combined,and the compactness of the Al-Mg-Ti composites is superior to that of the Al-Mg composites.In addition,a ternary phase Al（18）Ti2Mg3 can be observed.The presence of Mg can reduce the phase transition temperature of Al-Ti system,and the increase of Mg element is conducive to the further occurrence of Al-Ti reaction and finally the generation of ternary phase.

关 键 词：粉末冶金 AL基复合材料 微观组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TB331[金属学及工艺—金属材料]